3. Bay Bridge: Retrofit western span, including approaches. Build new 2.3 mile eastern span slightly north of old one, allowing cars to use existing structure during construction. Financing not determined, but costs likely be paid in part by a $1 increase in tolls on seven state-run, Bay Area bridges.

Time frame: New span: Seven years. Retrofit of west side begine in late 1997. Approach work begins mid-1999.

4. Central Freeway: The chief link to and from the western part of The City, the 37-year-old freeway has two segments: an elevated steel viaduct which is being strengthened, and a half-mile double deck, concrete structure. The top deck was demolished, the lower deck's fate is undecided. Officials are considering tearing out the south of Market structure. Environmental impact report expected by late summer.

Time frame: Started in mid-1996.

Cost: Upper deck demolition: $8 million. Replacement: $118 million.

5. Interstate 280: Retrofit and partially reroute northern end of I-280 in San Francisco. Demolish existing Fourth Street off-ramp and replaced with new ramps. Retrofit freeway columns and footings from 25th Street north to Brannan Street. Strengthen interchange with U.S. 101.

Time frame: three years, project started in late 1994.

Cost: $250 million

6. U.S. 101 / San Francisco International Airport Interchange: Part of a $2 billion expansion plan at the airport. Construct new ramps from U.S. 101, funneling traffic into airport's planned ground transportation terminal. The 3.5 mile project will add extra lanes to 101 involve minor interchange modifications.

8. Guadalupe Parkway / Route 87: Convert 3-mile stretch of the parkway and Hwy. 87 in San Jose from four-lane expressway to six-lane freeway; improve access to San Jose International Airport, closing a gap in the South Bay's freeway system.

10. I-880 car pool lanes and interchanges: Add car pool lanes on I-880 and rebuild interchanges along the 13-miles between the Santa Clara County line and Union City. Alameda County Transportation Authority and Caltrans project.

Time frame: Construction began in 1993 and should be completed by 2000

12. Cypress Freeway: Replace freeway, that collapsed in the 1989 Loma Prieta earthquake. New freeway, three lanes in each direction, will extend I-880 north from the I-980 interchange near Jack London Square to downtown Oakland to reconstruct West Grand Avenue interchange. Project then splits into two: one branch connecting with I-80 in Emeryville, the other with Bay Bridge toll plaza.

13. I-680 / Highway 24 interchange: Seven-phase, 7-mile project to expand and rebuild the interchange, widen stretches of I-680 to at least four lanes in each direction (six in some locations), construct sound walls, and improve ramps.

Time frame: Begun in 1989. Completion expected in 1998

Cost: $315 million

14. Carquinez Bridge: Retrofit east span of 0.8-mile link across Carquinez Strait. Caltrans also intends to use Regional Measure 1 funds to accelerate replacement of older west span (built in 1927).

Time frame: Retrofit: late 1997 to mid-2000. Replacement: Late 1998 - 2001.

Cost: Retrofit: $83 million. West span: $300 million.

15. Interstate 80: Add high-occupancy-vehicle lane in both directions for 16.5 miles, from Highway 4 in Hercules to the Bay Bridge toll plaza. I-80 / Powell Street interchange to provide longer merging area for traffic heading for eastbound I-580. Build new interchange at Richmond Parkway, and rebuild I-80 / I-580 interchange, allowing Eastshore Freeway travelers bound for Marin County to access the Richmond-San Rafael Bridge from the right lane.